Display device and method for manufacturing same

Abstract

Disclosed herein are a display device which exhibits superior surface flatness of an upper electrode substrate and excellent sealing effects by performing sealing such that an end of a barrier formed in a front electrode is inserted into the upper electrode having a gel-state, and a method of producing the same. The display device includes a first electrode module comprising a first electrode, a second electrode module including a second electrode, the second electrode module facing the first electrode module, a plurality of barriers formed on the first electrode module, each barrier having an end inserted into the second electrode, a plurality of cavities formed by the first electrode module and the barriers, and an electric field-dependent layer formed in each of the cavities, the electric field-dependent layer having properties changed by an electric field applied between the first electrode module and the second electrode module.

The invention claimed is: 
     
       1. A display device comprising:
 a first electrode module comprising a first electrode; 
 a second electrode module comprising a second electrode, the second electrode module facing the first electrode module; 
 a plurality of barriers formed on the first electrode module, each barrier having an end inserted into the second electrode; 
 a plurality of cavities formed by the first electrode module and the barriers; and 
 an electric field-dependent layer formed in each of the cavities, the electric field-dependent layer having properties changed by an electric field applied between the first electrode module and the second electrode module, and 
 wherein a thickness of the second electrode is greater than a depth of the end inserted into the second electrode, so that the end inserted into the second electrode is completely surrounded by the second electrode. 
 
     
     
       2. The display device according to  claim 1 , wherein the second electrode composition comprises at least one selected from the group consisting of a conductive polymer, carbon nanotubes (CNT), a metal nano-powder and graphene. 
     
     
       3. The display device according to  claim 2 , wherein the conductive polymer comprises at least one selected from the group consisting of polythiophene (PT), polyacetylene (PA), polyaniline (PA), polypyrrole (PPy) and polyphenylene (PP). 
     
     
       4. The display device according to  claim 2 , wherein the conductive polymer comprises poly(3,4-ethylenedioxythiophene) (PEDOT). 
     
     
       5. The display device according to  claim 2 , wherein the second electrode composition further comprises a UV curing agent or a heat curing agent. 
     
     
       6. The display device according to  claim 1 , wherein the electric field-dependent layer comprises at least one selected from the group consisting of a photonic crystal layer, an electrophoretic layer, an electrowetting layer, a cholesteric liquid crystal layer and a photoelectrochromic layer. 
     
     
       7. The display device according to  claim 1 , wherein the first electrode module further comprises a first substrate on which the first electrode is formed. 
     
     
       8. The display device according to  claim 1 , wherein the second electrode module further comprises a transparent second substrate on which the second electrode is formed, and
 the second electrode is transparent. 
 
     
     
       9. The display device according to  claim 7 , wherein the first electrode and the first substrate are transparent. 
     
     
       10. A method of producing a display device comprising:
 forming a plurality of barriers on a first electrode module comprising a first substrate and a first electrode; 
 applying a second electrode composition to a lower surface of a second substrate; 
 primarily curing the applied second electrode composition to a gel state; 
 stacking the second substrate on the barriers formed on the first electrode module, wherein the stacking includes inserting an end of each of the plurality of barriers into the gel-state second electrode composition; and 
 secondarily curing the second electrode composition, 
 wherein a thickness of the second electrode composition is greater than a depth of the end inserted into the second electrode composition, so that the end inserted into the second electrode composition is completely surrounded by the second electrode composition. 
 
     
     
       11. The method according to  claim 10 , wherein the secondary curing comprises emitting UV light or heat to the second electrode composition-applied second substrate. 
     
     
       12. The method according to  claim 10 , wherein the second electrode composition comprises a conductive material present in a gel state and a UV curing agent or a heat curing agent. 
     
     
       13. The method according to  claim 12 , wherein the conductive material comprises at least one selected from the group consisting of a conductive polymer, carbon nanotutes (CNT), a metal nano-powder and graphene. 
     
     
       14. The method according to  claim 10 , wherein the stacking comprises using a roll pressing process. 
     
     
       15. The method according to  claim 10 , wherein the stacking is performed simultaneously with the secondary curing. 
     
     
       16. The method according to  claim 10 , further comprising forming an electric field-dependent layer having properties changed by an electric field, in the cavities formed by the barriers. 
     
     
       17. The method according to  claim 16 , wherein the forming the electric field-dependent layer is performed before the stacking the second substrate. 
     
     
       18. The method according to  claim 16 , wherein the forming the electric field-dependent layer comprises filling the cavities with at least one of a photonic crystal material, an electrophoretic fluid comprising charged particles, a plurality of fluids immiscible with each other and a cholesteric liquid crystal.